On Fri, Aug 24, 2012 at 12:41 AM, Sangbeom Kim sbkim73@samsung.com wrote:
Hi!
On Thu, Aug 24, 2012 at 5:51 AM, Dylan Reid wrote:
On suspend all dma transactions are terminated (by the stop/suspend trigger calling ops->stop), they need to be set up again during resume. Move the prepare op to the start/resume/unpause trigger path so that dma and audio will restart on resume/unpause.
Do you mean that currently, suspend/resume can't be supported?
Yes. Currently, if I suspend while playing, after resume it won't work until I close and reopen the device. the call to snd_pcm_resume is not indicating an error, but a write error comes from snd_pcm_write a little later.
The suspend trigger calls ops->stop, which in turn sends DMA_TERMINATE_ALL to the pl330. I think this causes resume's call to ops->trigger to fail because there is nothing enqueued, but I'm pretty new to this system.
Thanks for the help!
Dylan
Thanks, Sangbeom.